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首页> 外文会议>Tenth International Conference on Modelling, Monitoring and Management of Air Pollution Jul, 2002 City of Segovia >Monitoring of aerosol properties from space for air quality studies
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Monitoring of aerosol properties from space for air quality studies

机译：监测太空中的气溶胶特性以进行空气质量研究

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In March 2002 the launch of the European environmental satellite ENVISAT is planned. ENVISAT carries several instruments to observe atmospheric and ground features. By exploiting the synergy of the spectrometer SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric Cartography) and the radiometer AATSR (Advanced Along Track Scanning Radiometer), both onboard ENVISAT, the spectral aerosol optical thickness (AOT) and through the spectral dependence the type of the aerosol mixture can be retrieved. As a result of the synergetic aerosol retrieval (SYNAER) AOT maps of 1 km horizontal resolution can be produced. This was demonstrated by exploiting a similar sensor pair, namely GOME (Global Ozone Monitoring Experiment) and ATSR-2 (Along Track Scanning Radiometer number 2), which are both still operational on the ERS-2 platform. These AOT maps can be used as an indicator of the load of particles in the air. The retrieved aerosol type contains information on chemical characteristics and the size distribution of particles in as far as the optical properties are altered by these microphysical properties. However, AOT values are integral results of all particles in the total column. For direct use of satellite-based aerosol measurements in air quality monitoring these remote sensing results have to be converted into near-surface particle mass concentration values for particles of different size ranges (e.g. PM10, PM2.5 or additionally PM0.5). This paper investigates several steps to solve this task. The accuracy of the conversion of AOT results into PM values depends on knowledge of the type of aerosols (which is estimated by SYNAER) and the vertical profile. It is shown that the UV part of the SCIAMACHY/GOME spectra contains information on the height of the boundary layer of absorbing aerosols and the stratospheric aerosol loading. Furthermore, a significant correlation was found between AOT values at 550 and 1000 nm and the mass concentrations of fine particles (PM0.5) and coarse particles (PM10-PM0.5), respectively.
机译：计划在2002年3月发射欧洲环境卫星ENVISAT。 ENVISAT携带多种仪器来观测大气和地面特征。通过利用光谱仪SCIAMACHY（用于大气制图的扫描成像吸收光谱仪）和辐射仪AATSR（沿轨道扫描辐射仪进行高级测量），既可在ENVISAT上使用，也可测量光谱气溶胶光学厚度（AOT），并通过光谱依赖性来确定可以回收气溶胶混合物。协同气溶胶回收（SYNAER）的结果是，可以生成水平分辨率为1 km的AOT地图。通过利用类似的传感器对，即仍在ERS-2平台上运行的GOME（全球臭氧监测实验）和ATSR-2（2号长径扫描辐射计）对进行了证明。这些AOT映射可以用作空气中粒子负载的指示器。所检索的气溶胶类型包含有关化学特性和颗粒尺寸分布的信息，只要这些微物理特性会改变光学特性即可。但是，AOT值是总列中所有粒子的积分结果。为了直接在空气质量监测中使用基于卫星的气溶胶测量值，必须将这些遥感结果转换为不同大小范围的颗粒（例如PM10，PM2.5或PM0.5）的近表面颗粒质量浓度值。本文研究了解决此任务的几个步骤。 AOT结果转换为PM值的准确性取决于对气溶胶类型（由SYNAER估算）和垂直剖面的了解。结果表明，SCIAMACHY / GOME光谱的紫外线部分包含有关吸收气溶胶边界层高度和平流层气溶胶载荷的信息。此外，发现在550和1000 nm的AOT值分别与细颗粒（PM0.5）和粗颗粒（PM10-PM0.5）的质量浓度之间存在显着相关性。

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